Observe the following motions of bodies and label them as Rotatory (R), Translatory (T), Translatory and Rotatory (TR). 1 The motion of blades of a ceiling fan 2 The motion of an arrow from a bow 3 The motion of the earth around the sun 4 The motion of a drill bit 5 The motion of wheels of an object.

The motion of blades of a ceiling fan is a rotational motion (R) because the blades follow a circular path with respect to an axis of rotation. Here the blades alone are changing their position continuously and moving in a circular path. The motion of an arrow from a bow is an example of translatory motion (T) because all parts of the arrows when left from the bow moves in the direction of motion taking a straight-line path. The motion of the earth around the sun is both a translational and rotational motion (TR). This is because the earth moves about its own fixed axis and around the sun. Thus, the motion of the earth about its axis makes the motion rotational and revolution around earth thereby makes the earth to have a TR motion. The motion of the drill possesses both rotational and translational motion because the drill when used rotate about itself while penetrating and also moves straight into the wall making the motion translational. Thus, it is a TR motion. The motion of wheels is a rotational motion as the wheels move along a circular path. But the cycle as a whole undergoes a translational motion. 1 The motion of blades of a ceiling fan Rotatory (R) 2 The motion of an arrow from a bow Translatory (T) 3 The motion of the earth around the sun Translatory and Rotatory (TR) 4 The motion of a drill bit Translatory and Rotatory (TR) 5 The motion of wheels of an object. Rotatory (R)

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Science Class VII>Chapter 4 - Motion & Time>EXERCISE>Q 6

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Identify the type of motion in coins on a carrom board.

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Important Questions on Motion & Time

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Science Class VII>Chapter 4 - Motion & Time>EXERCISE>Q 7

Identify the type of motion of the ball in pin board.

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Science Class VII>Chapter 4 - Motion & Time>EXERCISE>Q 8

Identify the type of motion of a mango falling from tree.

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Science Class VII>Chapter 4 - Motion & Time>Let's do- 7>Q 1

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What similarities do you find in all the motions?

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Science Class VII>Chapter 4 - Motion & Time>Let's do- 7>Q 2

What is the path of motion of each particle of the body that moves?

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Science Class VII>Chapter 4 - Motion & Time>Let's do- 7>Q 3

Observe the Figure and Answer the following: Is there any change in the position of a body while it is in motion?

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Science Class VII>Chapter 4 - Motion & Time>EXERCISE>Q 1

Observe the following motions of bodies and label them as Rotatory (R), Translatory (T), Translatory and Rotatory (TR).

1		The motion of blades of a ceiling fan
2		The motion of an arrow from a bow
3		The motion of the earth around the sun
4		The motion of a drill bit
5		The motion of wheels of an object.

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Science Class VII>Chapter 4 - Motion & Time>EXERCISE>Q ●

Observe the following pictures and answer the following question: What similarity do you find in the motions of the above-given situations?
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